li {list-style: none;}
a {text-decoration: none;color: #333333;}
.px2rem(@name, @px){
    @{name}: @px / 75 * 1rem;
}

.webkit{
    display: -webkit-flex;
    display: -moz-flex;
}
.line-height(@arg){.px2rem(line-height, @arg);}
.font-size(@arg){.px2rem(font-size, @arg);}

.font(@fz,@color){
    .px2rem(font-size,@fz);
    color: @color;
}
.border-bottom(@px,@xian,@color){
    .px2rem(border-bottom-width,@px);
    border-bottom-style: @xian;
    border-bottom-color: @color;
}
.border-top(@px,@xian,@color){
    .px2rem(border-top-width,@px);
    border-top-style: @xian;
    border-top-color: @color;
}
.border(@px,@xian,@color){.px2rem(border-width,@px);border-style: @xian; border-color: @color;}

.padding-top(@top){.px2rem(padding-top, @top);}
.padding-right(@right){.px2rem(padding-right, @right);}
.padding-bottom(@bottom){.px2rem(padding-bottom, @bottom);}
.padding-left(@left){.px2rem(padding-left, @left);}

.padding(@top,@right,@bottom,@left){
   .px2rem(padding-top,@top);
   .px2rem(padding-right,@right);
   .px2rem(padding-bottom,@bottom);
   .px2rem(padding-left,@left);
}

.margin-top(@top){.px2rem(margin-top, @top);}
.margin-right(@right){.px2rem(margin-right, @right);}
.margin-bottom(@bottom){.px2rem(margin-bottom, @bottom);}
.margin-left(@left){.px2rem(margin-left, @left);}

.margin(@top,@right,@bottom,@left){
   .px2rem(margin-top,@top);
   .px2rem(margin-right,@right);
   .px2rem(margin-bottom,@bottom);
   .px2rem(margin-left,@left);
}
body,html{
    font-family: "微软雅黑";
    height: 100%;
}




main{
    position: relative;
    header{
    .px2rem(height,130);
 width: 100%; 
     position: fixed;
     left: 0;
     top: 0;
     z-index: 99;
     background: white;
     .webkit();
        align-items: center;
        justify-content: center;
        text-align: center;
    ul{
       
        width: 100%;
        .webkit();
        align-items: center;
        justify-content: center;
        text-align: center;
        li{
            .px2rem(width,300);
            .px2rem(height,75);
            .line-height(75);
            border: 2px solid #E25b1E;
            box-sizing: border-box;
            .font-size(28);
            color: #E25b1E;
            
           
        }
        
        li:nth-child(1){
            .px2rem(border-top-left-radius,10);
           .px2rem(border-bottom-left-radius,10);
        }
        
        li:nth-child(2){
            .px2rem(border-top-right-radius,10);
           .px2rem(border-bottom-right-radius,10);
        }
    }
}



nav{
    .px2rem(height,120);
//  .padding-top(130);
    background: #E25b1E;
    position: fixed;
    left:0;
    .px2rem(top,130);
    
    width: 100%;
    z-index: 88;
    .title{
                width:100%;
                .px2rem(height,60);
                display: flex;
                justify-content: center;
                align-items: center;
               .px2rem(height,120);
                span{
                    height: 100%;
                    display: block;
                    flex: 1;
                    display: flex;
                    align-items: center;
                    justify-content: center;
                    img{
                      .px2rem(height,60);
                      .px2rem(width,50);
                    }
                }
                p{
                   .px2rem(font-size,38);
                   color: white;
                    width: 60%; 
                  display: flex;
                  align-items: center;
                  justify-content: center;  
               
                }
                
                }
               .screen{
                 flex: 1;  
                 height: 100%;
                 text-align: center;
                 display: flex;
                align-items: center;
                justify-content: center;
                color: #CFCFCF;
                   
                }
            
    }
    









}

